IBM Broadcom BCM43224 BCM943224HMS PCI Express Half Mini Card 802.11a/g/n 2.4/5GHz 300Mbps Note: this wireless card could only work on IBM/Lenovo/Thinkpad version laptop Broadcom chip brand: BCM943224HMS Compact with : IBM X121 E220 E420 E425 E520 E525 Edge 11"13" (Machine types: 0217, 0221, 0250) Edge 14", 15" X100e The BCM43224 is a single-chip baseband/MAC/radio all-in-one die with integrated dual-band power amplifiers for 2x2 2.4 GHz and 5 GHz 802.11n applications. The low-cost CMOS implementation for MAC, Baseband, and Radio allows integration with Broadcom's Cable/DSL/Set-top/VoIP chipsets. The BCM43224 has the industry's first integrated dual-band 802.11n power amplifiers, eliminating the need for external power amplifiers, significantly reducing the rest-of-BOM (RBOM) and footprint. Frequency range: 802.11ABGN